Blow by

Tiny
JUSTIN AQUILINA
  • MEMBER
  • 1991 ISUZU KB280
  • 2.5L
  • 4 CYL
  • 4WD
  • MANUAL
  • 180,000 MILES
Hi,

I would like to know if it is normal to have an engine with blow by? It does not consume any oil.
Saturday, April 6th, 2019 AT 6:53 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning,

Blow by is normal. Your PCV system is what controls the crankcase pressure from compression passing the rings.

Excessive amounts is not right if the PCV system is clogged or the piston rings are worn out.

Roy
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Saturday, April 6th, 2019 AT 7:08 AM
Tiny
JUSTIN AQUILINA
  • MEMBER
  • 9 POSTS
Thanks for your reply. Is it normal to have this blow by? Engine runs normally and fine without any oil consumption etc.
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Saturday, April 6th, 2019 AT 9:27 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
That is not bad.

Clean out the PCV system.

Roy
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Saturday, April 6th, 2019 AT 9:33 AM
Tiny
JUSTIN AQUILINA
  • MEMBER
  • 9 POSTS
Okay. Thanks Roy for your feedback.
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Saturday, April 6th, 2019 AT 9:38 AM
Tiny
ASEMASTER6371
  • MECHANIC
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You're welcome.

Always glad to help.

Roy
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Saturday, April 6th, 2019 AT 10:21 AM

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